There may be no single cause of bipolar disorder (aka manic depression). Instead, research indicates the causes of bipolar disorder are probably a combination of biochemical, genetic and environmental factors that may trigger and perpetuate the chemical imbalances in the brain.
Net worth: $829 million. Telecommunications mogul Strive Masiyiwa is widely regarded as the richest man in Zimbabwe and is one of the richest men in Africa with a net worth of more than US$800 million.
Autocrat of Libya during 1969â2011.After his death in 2011, reports surfaced that Muammar Gaddafi was secretly the wealthiest person in the world with a net worth of $200 billion. In the months surrounding his death nearly $70 billion in cash was seized in foreign bank accounts and real estate..